Season 1 (1968)
7.06 avg 30 episodes 7.3 → 7.4 51 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | The Beginning | 7.3 | 182 |
| 2 | The Invisible Man | 7.2 | 154 |
| 3 | Reply Box No. 666 | 6.3 | 123 |
| 4 | The Experiment | 7.4 | 120 |
| 5 | Happening | 6.8 | 108 |
| 6 | Operation Deep-Freeze | 6.8 | 109 |
| 7 | The Survivors | 7.0 | 105 |
| 8 | To Trap a Rat | 7.4 | 115 |
| 9 | The Iron Man | 6.3 | 109 |
| 10 | The Ghost Plane | 7.0 | 114 |
| 11 | The Dark Island | 7.2 | 112 |
| 12 | The Fanatics | 7.5 | 103 |
| 13 | Twelve Hours | 7.2 | 102 |
| 14 | The Search | 7.0 | 102 |
| 15 | The Gilded Cage | 7.1 | 108 |
| 16 | Shadow of the Panther | 7.2 | 95 |
| 17 | A Case of Lemmings | 7.1 | 94 |
| 18 | The Mission | 7.1 | 80 |
| 19 | The Interrogation | 7.2 | 110 |
| 20 | The Silent Enemy | 7.0 | 87 |
| 21 | The Body Snatchers | 6.7 | 87 |
| 22 | Get Me Out of Here! | 6.5 | 92 |
| 23 | The Night People | 7.2 | 94 |
| 24 | Project Zero | 7.6 | 97 |
| 25 | Desert Journey | 7.2 | 73 |
| 26 | Full Circle | 6.9 | 84 |
| 27 | Nutcracker | 7.5 | 86 |
| 28 | The Final Countdown | 7.2 | 84 |
| 29 | The Gun-Runners | 6.6 | 81 |
| 30 | Autokill | 7.4 | 89 |